This document discusses using Web 2.0 technologies for teaching. It defines Web 2.0 as enabling greater social and participatory use of the web. It then categorizes common Web 2.0 applications such as wikis, blogs, bookmarking, multimedia sharing, and conferencing tools. For each category, examples of educational uses are provided, such as using wikis for collaborative projects or blogs for reflective journals. The document recommends considering how applications support learning goals, experimenting with short assignments, and evaluating effectiveness. Web 2.0 can provide many collaborative tools to engage students and extend traditional course management systems.